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index 100aadf260700bdbb0c77f59c16cfedd0ca50048..4e8d468c4263f0e57cd2f26d301aedf0006102a7 100644 (file)
--- a/src/include/core/store.h
+++ b/src/include/core/store.h
#include "core/object.h"
#include "core/data.h"
#include "core/time.h"
-#include "utils/llist.h"
#include "utils/strbuf.h"
#include <stdio.h>
#endif
/*
- * sdb_store_base_t represents the super-class of any object stored in the
+ * Store object types.
+ */
+enum {
+ SDB_HOST = 1,
+ SDB_SERVICE,
+ SDB_ATTRIBUTE,
+};
+#define SDB_STORE_TYPE_TO_NAME(t) \
+ (((t) == SDB_HOST) ? "host" \
+ : ((t) == SDB_SERVICE) ? "service" \
+ : ((t) == SDB_ATTRIBUTE) ? "attribute" : "unknown")
+
+
+/*
+ * sdb_store_obj_t represents the super-class of any object stored in the
* database. It inherits from sdb_object_t and may safely be cast to a generic
* object to access its name.
*/
-struct sdb_store_base;
-typedef struct sdb_store_base sdb_store_base_t;
+struct sdb_store_obj;
+typedef struct sdb_store_obj sdb_store_obj_t;
+
+/*
+ * sdb_store_clear:
+ * Clear the entire store and remove all stored objects.
+ */
+void
+sdb_store_clear(void);
/*
* sdb_store_host:
_Bool
sdb_store_has_host(const char *name);
-sdb_store_base_t *
+sdb_store_obj_t *
sdb_store_get_host(const char *name);
/*
/*
* sdb_store_service:
- * Add/update a store in the store. If the service, identified by its name,
+ * Add/update a service in the store. If the service, identified by its name,
* already exists for the specified host, it will be updated according to the
* specified 'service' object. If the referenced host does not exist, an error
* will be reported. Else, a new entry will be created in the store. Any
sdb_store_service(const char *hostname, const char *name,
sdb_time_t last_update);
+/*
+ * sdb_store_service_attr:
+ * Add/update a service's attribute in the store. If the attribute, identified
+ * by its key, already exists for the specified service, it will be updated to
+ * the specified value. If the references service (for the specified host)
+ * does not exist, an error will be reported. Any memory required for storing
+ * the entry will be allocated and managed by the store itself.
+ *
+ * Returns:
+ * - 0 on success
+ * - a positive value if the new entry is older than the currently stored
+ * entry (in this case, no update will happen)
+ * - a negative value on error
+ */
+int
+sdb_store_service_attr(const char *hostname, const char *service,
+ const char *key, const sdb_data_t *value, sdb_time_t last_update);
+
+/*
+ * Conditionals may be used to lookup hosts from the store based on a
+ * conditional expression.
+ *
+ * A conditional object inherits from sdb_object_t and, thus, may safely be
+ * cast to a generic object.
+ */
+struct sdb_store_cond;
+typedef struct sdb_store_cond sdb_store_cond_t;
+#define SDB_STORE_COND(obj) ((sdb_store_cond_t *)(obj))
+
+/*
+ * sdb_store_attr_cond:
+ * Creates a conditional based on attribute values. The value of stored
+ * attributes is compared against the specified value. See sdb_data_cmp for
+ * details about the comparison.
+ */
+sdb_store_cond_t *
+sdb_store_attr_cond(const char *name, const sdb_data_t *value);
+
+/*
+ * Store matchers may be used to lookup hosts from the store based on their
+ * various attributes. Service and attribute matchers are applied to a host's
+ * services and attributes and evaluate to true if *any* service or attribute
+ * matches.
+ *
+ * A store matcher object inherits from sdb_object_t and, thus, may safely be
+ * cast to a generic object.
+ */
+struct sdb_store_matcher;
+typedef struct sdb_store_matcher sdb_store_matcher_t;
+#define SDB_STORE_MATCHER(obj) ((sdb_store_matcher_t *)(obj))
+
+/*
+ * sdb_store_name_matcher:
+ * Creates a matcher matching by the specified object type's name. If 're' is
+ * true, the specified name is treated as a POSIX extended regular expression.
+ * Else, the exact name has to match (case-insensitive).
+ */
+sdb_store_matcher_t *
+sdb_store_name_matcher(int type, const char *name, _Bool re);
+
+/*
+ * sdb_store_attr_matcher:
+ * Creates a matcher matching attributes based on their value. If 're' is
+ * true, the specified name is treated as a POSIX extended regular expression.
+ * Else, the exact name has to match (case-insensitive).
+ */
+sdb_store_matcher_t *
+sdb_store_attr_matcher(const char *name, const char *value, _Bool re);
+
+/*
+ * sdb_store_isnull_matcher:
+ * Creates a matcher matching "missing" attributes.
+ */
+sdb_store_matcher_t *
+sdb_store_isnull_matcher(const char *attr_name);
+
+/*
+ * sdb_store_lt_matcher, sdb_store_le_matcher, sdb_store_eq_matcher,
+ * sdb_store_ge_matcher, sdb_store_gt_matcher:
+ * Creates a matcher based on a conditional. The matcher matches objects for
+ * which the conditional evaluates the object to compare less than, less or
+ * equal, equal, greater or equal, or greater than the conditional's value
+ * repsectively.
+ */
+sdb_store_matcher_t *
+sdb_store_lt_matcher(sdb_store_cond_t *cond);
+sdb_store_matcher_t *
+sdb_store_le_matcher(sdb_store_cond_t *cond);
+sdb_store_matcher_t *
+sdb_store_eq_matcher(sdb_store_cond_t *cond);
+sdb_store_matcher_t *
+sdb_store_ge_matcher(sdb_store_cond_t *cond);
+sdb_store_matcher_t *
+sdb_store_gt_matcher(sdb_store_cond_t *cond);
+
+/*
+ * sdb_store_matcher_parse_cmp:
+ * Parse a simple compare expression (<obj_type>.<attr> <op> <value>).
+ *
+ * Returns:
+ * - a matcher object on success
+ * - NULL else
+ */
+sdb_store_matcher_t *
+sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr,
+ const char *op, const sdb_data_t *value);
+
+/*
+ * sdb_store_dis_matcher:
+ * Creates a matcher matching the disjunction (logical OR) of two matchers.
+ */
+sdb_store_matcher_t *
+sdb_store_dis_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right);
+
+/*
+ * sdb_store_con_matcher:
+ * Creates a matcher matching the conjunction (logical AND) of two matchers.
+ */
+sdb_store_matcher_t *
+sdb_store_con_matcher(sdb_store_matcher_t *left, sdb_store_matcher_t *right);
+
+/*
+ * sdb_store_con_matcher::
+ * Creates a matcher matching the inverse (logical NOT) of a matcher.
+ */
+sdb_store_matcher_t *
+sdb_store_inv_matcher(sdb_store_matcher_t *m);
+
+/*
+ * sdb_store_matcher_matches:
+ * Check whether the specified matcher matches the specified store object.
+ *
+ * Returns:
+ * - 1 if the object matches
+ * - 0 else
+ */
+int
+sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj);
+
+/*
+ * sdb_store_matcher_tostring:
+ * Format a matcher object as string. This is meant for logging or debugging
+ * purposes.
+ */
+char *
+sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen);
+
+/*
+ * sdb_store_lookup_cb:
+ * Lookup callback. It is called for each matching object when looking up data
+ * in the store. The lookup aborts if the callback returns non-zero.
+ */
+typedef int (*sdb_store_lookup_cb)(sdb_store_obj_t *obj, void *user_data);
+
+/*
+ * sdb_store_scan:
+ * Look up objects in the store. The specified callback function is called for
+ * each object in the store matching 'm'. The function performs a full scan of
+ * all hosts stored in the database.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_store_scan(sdb_store_matcher_t *m, sdb_store_lookup_cb cb,
+ void *user_data);
+
/*
* Flags for serialization functions.
*
SDB_SKIP_ATTRIBUTES = 1 << 0,
SDB_SKIP_SERVICES = 1 << 1,
SDB_SKIP_SERVICE_ATTRIBUTES = 1 << 2,
+
+ SDB_SKIP_ALL = 0xffff,
};
/*
* - a negative value on error
*/
int
-sdb_store_host_tojson(sdb_store_base_t *host, sdb_strbuf_t *buf, int flags);
+sdb_store_host_tojson(sdb_store_obj_t *host, sdb_strbuf_t *buf, int flags);
+
+/*
+ * sdb_store_iter_cb:
+ * Store iterator callback. Iteration stops if the callback returns non-zero.
+ */
+typedef int (*sdb_store_iter_cb)(sdb_store_obj_t *obj, void *user_data);
+
+/*
+ * sdb_store_iterate:
+ * Iterate the entire store, calling the specified callback for each object.
+ * The user_data pointer is passed on to each call of the callback.
+ *
+ * Returns:
+ * - 0 on success
+ * - a negative value else
+ */
+int
+sdb_store_iterate(sdb_store_iter_cb cb, void *user_data);
#ifdef __cplusplus
} /* extern "C" */